Parameters
- key
 - The stream filename or file URL.
 - item
 - The stream data.
 
| Exception | Description | 
|---|---|
| System.ArgumentNullException | Thrown if key is null or empty. | 
Method creates new file in data storage, writes data into the file and closes the file.
Target Platforms: .NET 10; .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5